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Troubleshooting
Symptom
No power, or none of the
system LEDs are lit.
Refer to Chapter 5, Maintenance and Troubleshooting , in the FrameSaver 9620
User's Guide (Document No. 9621-A2-GB20) or Chapter 5, Troubleshooting and
Maintenance, in the Frame Relay Access Unit, Model 9620/9621, Technical Reference
(Document No. 9621-A2-GH30) for additional troubleshooting information.
Removing a Power Cord
When disconnecting a power cord/supply from an installed access unit:
1. Disconnect the power cord plug from the power outlet first.
2. Then, depress the locking tab of the 4-prong plug from the rear of the access unit to
disconnect the power supply.
*9000-A2-GN21-00*
Possible Cause
Power cord is not securely
plugged into the wall power
outlet or the universal
power supply.
Universal power supply is
not securely connected to
the power cord, or to the
rear panel connector.
Wall receptacle has no
power.
LED is burned out.
Power supply is defective.
*9000–A2–GN21–00*
4
Solutions
Check that the power cord
is securely attached at both
ends.
Check that the universal
power supply is securely
attached at both ends.
1. Check the wall
receptacle power by
plugging in some
equipment that is known
to be working.
2. Check the circuit
breaker.
Run the Lamp Test. If the
LED in question does not
flash with the other LEDs:
1. Check the async
terminal-to-COM port
connection.
2. Contact your sales or
service representative.
Contact your sales or
service representative.
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